Wash-over, outside cutter



Patented Apr. 23, 1946 unirse stares s PAT ENT WAsHLovE-moUTsIDE-CUTTER l Kenneth.E..Waggener; Brea,, Calif.

, Applieatimivrayfeg 1944, sentirne; 584,497'

- operationiste makeup and'vlowerrasuitableout'- side ncutting-off 'bit tool-down; over-the nake'dori Washed; pipe',v and operate the bit' tosever" the and,l advantages as hereinafter' developed, and Whose construction, combinationsand sub-conrbinations; and details o'fmeans, andthe manner of' operation will bemade-manifest inthe followe ingfdescription oft the herewith illustrativeA enrbodiment'; it' being understoodithat: modifications, variationsA andadaptations may be'u resorted to within the scope, spirit' and principleof the-inf vention as'it is more directlyclaimed' hereinl below;

Figure 1l is' an axial sectional Viewt of thetool showingA the cuttercontrolling sh gripping'device in extended'ordisen'gagedl position from the cutting` device, and the latter in fixed or pinned,`

la idle position. pip-.dialed then pu'lltheibit andthe entnapp'e'd, Figure 2 is a d'etailsectional'fview-l showing the severediiishsectiorr of such'ilength: asmay be'en'- cutting device and the barrel ofthe tool moved closedir'thetool: up as tothe-fish gripping' device' preparatorytb object 'ofthi'sinvention is'to'provideacutreleasing the fixed' cuttingbits's ting-offishin'g tool in' which there-is amecha- 20 Figure-3-isadetailsectionalfviewshowing the nism, includinga set of cuttingbitsof suohoon'- wedging ringl of'thebits in'A theA freed onsheared structionand'arran'gement, of'parts thatthe tool pin position andi operative onthe-bitsto feed can be'loweredinto' aholetoenconipassthe'pree them into'the-Worl, that is'theiish body, While` sented part. of the fish' and' which tool caribe theto'olisbodily rotatedabout the frozen sh raisedg', afterA the sh isV encountered',- asmay: bev 25 and its adherent gripping dv'edesiredgwithout causing' the. bits'to be set in cut- The tool unit embodiesa^- suitable-size, tubular ting engagement' witht'he' 'sh: This is a' novel body structure formedof appropriate-boWllZ' and andr advantageous., feature over types of fishing barrel Seseotions, thelatter attached at its `upperto'ols'in'. which the'eectiverecovering elements, end to a suitabletool stringfS-bywhichtheunit as the: cutters" and pick=up means cannot' bei 3U maybe loweredfto encompass `theivvell part to be freely shiftedl vertically, that is; elevated', once shed and may be rotated and raised or lowered,l they haveipassedidovvn belowa; co'operativeshoulas needed, about the potential iish` while Wash-- deralon'g' the4 fish. part which" is to' be salvag'ed over water is pumped down the hole to barefas from thehole; much as possible or desiredof'the sh'which It is'here an objectotthe invention to provide, 35" may b'e-a frozendrill pille fOr examplea fishingoolwh'ose construction is such that the Suitably disposed'in the barrel, as oniits nipplev tool may beopera'ted in. jobs on that has Sais-an annular set o'f'cutting bitsd pivot'edf' at neexternarshoulders along,itslengtmandwheretheirlower ends-androining upwardly and tilt'-V by even`if" there besuch shoulders'the tool: may able inwardly' but normally` rel'easablyV xed in be; manipulated entirely without interrerencezby 40 inoperativel upright position by any suitable such shoulders; means,`v` asibyweak keyszlla:

Broadly,ran,obj ect of the inventionisto provide To positivelyffree andpress the bits inwardly ashingtoolwhich Willprovidefbrbotha contheir upper ends' arely engageabl'e e by a camr4 or tinuous wash over of` the potential sh andla Wed'gering slidablytting. in the'barrel bore severancethereof at anypoint along the Washed 45 and" normally lock-ed by suitable meansas shear lengthv thereoffby free.. elevation of4 the cutting, bit's, to the desiredllevel regardless' oi'inoidentalA const'ructionalshouldersv which mightbe present along, the. washed" 'sh, and,` therefore,` may beA readily operated on aflu'sh joint pipe.

Also, an" object ofthe invention is to' provide a shingitool. which is telescopic over, a sh and' has, in,combination, a cutting mechanismA which is controlledandmade operativeby the sh' when' the toolis, rotated about the iishand yet which" mechanism` mayrbe -moved up' along; the 'sh to, anydesired'degree irrespective ofA fishl shoulders:

Thenventionconsists'in certainadvancements in this art asset forth',irrtirieensuing-l disclosure and having; with* the above: additional objects pins 6', tothe barrellwa'll'.

To feed"v the bits inwardly' constantly during their" cutting actionl their-ingr 5= isV loaded by an imposed, helical spring 'l5 compressed insuilioiently`A 50 to shear the pins' 6, under a header ball-bearing 8.

Abutting the anti-friction bearing 8 is a sleeve. 9' having external threads Sa, fitting' threadsinvv barrel 3 and Whose function is'to apply enough4 pressure tothe spring Vto cause severance of the 55 pin or pinsfG-Whichfhold'tlie camlring 5 in inefieo tive positionfuntil it is desired' to trip Athe cutting bits 4 for biting into tIieintrudedShFf It is; desirable that?tlfrertool'funit',4 may- 'begradi ual1yloweredxt into*v theehole While wash waterVA 6o pumped dbwnltoewash* overeasflongiae par-t of the released bits 4 to unkey them (if keyed) and to f feed them into the frozen part of the fish to be severed.

For the said releasing purpose there is slidably and turnably tted in the bore of the barrel 3,r

above the spring 'l and the sleeve 8, an elongate, tubular jacket Il having on its lower end a spur means Ha, to interclutch with the upper end of the sleeve 9 for effectively coupling them against relative rotation. As the tool unit is lowered about the stuck iish the jacket telescopes over the fish and is frictionally held thereto by a system of elongate, upright, inbowed Spring bars l2 appropriately attached, in a ring arrangement, to the bore face of the jacket Il. As the barrel 3 is lowered the friction between the iish and the spring bars l2 causes the jacket to stand still until its upper end is engaged by a shoulder I4 provided in the barrel structure. The jacket is therefore fully unlatched from the sleeve S and thereafter the jacket and its jaws l 2 will be forced slidingly down along the gripped nsh until such time as it may be desired to re-elevate the tool unit along the nowwashed iish, regardless of Whether it has external shoulders or not.

It is possible with this tool to wash over many feet of a fish (along its length) and to then pull the cutting mechanism up a considerably along the ish before a iirst cut is made since the vise jaws of the jacket ll will forcibly pull up over and past such drill pipe shoulders as may be met on the pipe to be cut.

When the tool barrel moves up after the jacket is arrested on the fish by the jaws d2 the sleeve is interlocked at the spurs Ila to the jacket H and if the barrel is rotated (bythe string S) the sleeve will screw downwardly in the barrel by rotation of the string in one direction; for instance clockwise-looking down the axis of the tool.

At the level Where the cut is to be made in the fish the tool string and the cutting unit are now slowly rotated with the result that the friction of the jaws I2 on the fish holds the jacket fast against rotation with the barrel 3 and as the jack sleeve consequently works down in the barrel threads the spring l will be compressed by resistance of the rotating, but non-shifting, cam ring 5 and finally this will be freed or unpinned by breakdown of the shear pins Bland thereafter the cutting bits will be pressed free from their restraining means and forced inwardly with requisite pressure to take a cut in the fish whilst being powerfully rotated around the sh by the now relatively rotatively driven string S and its attached tool barrel 3.

As soon as the sh is severed at the cutting plane the bits act to grapple under the upper, cut olf, sh section and then the whole tool is pulled up by the string.

It will be clear that the primary cutter control tripping means, that is the jacket and its jaws, in no manner interfere with the lowering or elevating of the tool unit and do not depend on any form of cooperative stop means on or along the fish pipe to trip the cutters. This capacity allows use of the tool to Wash over the fish for a. great length and the ready pull back of the tool unit to any level for making the severing cut.

What is claimed is:

1. A deep well, drill pipe wash-over and outside cutting-off tool having, in combination, a rotary barrel, a set of normally inoperative bits pivoted in the barrel, a temporarily fixed, wedge ring operative when free to press the bits into contact with a pipe to be severed and raised, and means mounted in the barrel to release the xed ring for action on the bits and including a sleeve screwed in the barrel, and a friction means freely slidable and turnable in the barrel and interlockable with said sleeve to hold it while the barrel is relatively rotated. 2. The tool of claim 1, and a spring interposed between the ring and the sleeve for advancing the bits into the pipe to be cut after the ring is released.

3. A wash-over and cutting off fishing tool including a barrel adapted to be lowered onto 4a part to be severed and recovered, a set of bits in the barrel, a fastened, releasable wedge ring,r operative to contract the cutters onto said part, resilient means acting constantly on the ring with shifting effort insufficient to release it, rotary means mounted in the barrel and operative to increase. the effort of said resilient means, and a friction means freely slidable and turnable in the barrel and positively interlockable with said rotary means to hold it while the barrel is relatively rotated; said friction means being adapted to grapple on the said part and being lowerable to a desired position thereon and then pulled back regardless of encounterable shoulders on said part.

4. The tool of claim 3; said rotary means consisting of a sleeve in the barrel and turnably engaging the resilient means.

5. The tool of claim 3; said resilient means including a spring disposed in an unattached manner between said rotary means and the said I`1ng./

6. A tool of the class described and including a rotary barrel to be lowered overa part frozen in a well or hole, a set of part cutting bits in the barrel, a restrained means adapted to force the cutters into cutting position, means screwed in the barrel and operative to force the restrained means into eiect on the cutters when the screwed means is rotated as to the restrained means, a coupling device adapted to be shifted into co-rotational interlock with the screwed means and which includes a friction device to grapple on and be slidable down and up to any desired position of the said frozen part without effect of a trip action on the cutters.

7. A deep well, drill pipe wash-over and cutting-off tool having in combination, a rotary barrel to be lowered over the said pipe, normally idle bits in the barrel, a restrained device to set the bits, a releasing means relatively rotary and unattached as to and for actuating the said device. and a friction means freely slidable and turnable in the barrel and interlockable with the releasing means to hold it while the barrel is relatively rotated.

8. The tool of claim "i; said restrained device and said releasing means having, relatively, axial shift.

9. The tool of claim 7; and a spring interposed between and unattached as to the restrained device and the releasing means and which is compressed by action of the device.

. i KENNETH E. WAGGENER. 

